1243321242 has 16 divisors (see below), whose sum is σ = 2516603040. Its totient is φ = 409446992.

The previous prime is 1243321241. The next prime is 1243321271. The reversal of 1243321242 is 2421233421.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1243321241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1247817 + ... + 1248812.

It is an arithmetic number, because the mean of its divisors is an integer number (157287690).

Almost surely, 2^1243321242 is an apocalyptic number.

1243321242 is an abundant number, since it is smaller than the sum of its proper divisors (1273281798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243321242 is a wasteful number, since it uses less digits than its factorization.

1243321242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496717.

The product of its digits is 2304, while the sum is 24.

The square root of 1243321242 is about 35260.7606554368. The cubic root of 1243321242 is about 1075.2953915480.

Adding to 1243321242 its reverse (2421233421), we get a palindrome (3664554663).

The spelling of 1243321242 in words is "one billion, two hundred forty-three million, three hundred twenty-one thousand, two hundred forty-two".